Floor-jack



' UNITED STATES PATENT OFFICE.

JAMES EDWARD BEAN, OF IRONWOOD, MICHIGAN.

FLOOR-JACK.

SPECIFICATION forming part of Letters Patent No. 430,613, dated June 24, 1890.

Application filed July 23, 1889. Serial No. 318,379. (No model.)

of space, so that all the boards of the flooring.

may be forced toplace except the last board of the said flooring; and to the end named the invention consists, essentially, of a headblock formed with a grooved bearing-face, a spirally-inclined cam pivotally mounted upon the head-block and provided with a lever-arm, and a retaining block or plate provided with retaining-claws and loosely connected to the head-block and arranged to be borne upon by the spirally-inclined cam, all as will be hereinafter fully described, and specifically pointed out in the claims.

Reference is to behad to the accompanying drawings, forming a part of this specification, in which similar figures and letters of reference indicate corresponding parts in all the views.

Figure 1 is a perspective view of my improved floor jack. Fig. 2 is an end View thereof; and Fig. 3 is a sectional plan view, parts being broken away.

In the drawings, 10 represents a head-block that is formed or provided with a stud 11, which has a projection 12, the bearing-face of the head-block being formed with a groove (1, adapted to receive the tongues of the boards that are to be forced to place. Upon the stud 11, I mount a hub 13, that is surrounded by a flange 14, having a spirally-inclined cam-face b, the hub being formed with a recess 0, through which the projection 12 is passed, said projection serving to hold the hub to place'after said hub has been adjusted to position upon the stud. The hub 13 is also formed with a socket 15, in which there is fitted a lever arm or handle 16.

The retaining-block, which is shown at 20, is formed with side grooves d, adapted to re ceive projections 21, which are rigidly connected to or made integral with the headblock and extend laterally therefrom; and in order that the retainingblock maybe held from accidental displacement I provide one or both of the projections 21 with pins 22, which enter grooves 6, formed in the retaining-block, said grooves running from the outer edge of the block inward toward but not to the inner edge of said block. To the outer edge of the retaining-block I adjust ably connect claws 24:.

In operation the head block is placed against the board that is to be forced home, the lever 16 at this time being turned over to a position opposite that in which it is shown in Fig. 1, which adjustment of the lever will permit the shoving up of the retaining-block close to the face of the head-block, and the retaining-block having been so adjusted over a floor-beam the claws 24 are driven into said beam, and then the lever 16 is moved to the position in which it is shown in Fig. 1, and as the lever is so moved the cam-faced flange 14 will actto force the head-block forward, and consequently carry the board up to place.

In practicel prefer to form the head-block so that it will extend beyond its projections 21, as shown at f in the drawings, these extending portions aifording an opportunity for lightly tapping the head-block with a hammer to carry the boardbeingoperatedupon to place. The claws 2 1 are held to the retaining-block by screws g, which pass through slots h, formed: in said claws, the arrangement being such that the claws may be readily removed for the purpose of sharpening them.

' Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. In a floor-jack, the combination, with a head-block provided with laterally-extending stud 11 and projections 21, of the hub 13, provided with the flange 14:, having the inclined cam-facet and mounted on the said stud, the lever 16, secured to the hub, and the retaining-block 20, provided with claws and mounted to slide on the projections 21, substantially as herein shown and described.

2. In a floor-jack, the combination, with a pins 21 and 22, and vvith theadjustable claws head-block provided with the laterally-ex- 24, substantially as herein shown and detending projections 21, having pins 22, a hub scribed.

having a spiral cam-face mounted on the JAMES E. BEAN. head-block, and a lever connected to the hub, 'Witnesses:

of the retaining-block 20, provided with the QUAY B. JONES,

grooves d e to receive the projections and GEO. F. KELLY. 

